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    <title>Document</title>
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    <h1>JS 的变量</h1>
    <hr>

    <script>
        var n = 'JS';
        var n1=12, n2=22, n3=32;
        var n5 = n6 = n7 = 66;


        console.log(n);
        console.log(n3);
        console.log(n7);

    </script>

    <script>
        alert(n6);

    </script>
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